File:Crystal radio in a parasol.jpg
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Summary
[edit]DescriptionCrystal radio in a parasol.jpg |
English: A woman in Paris around 1922 listening to a tiny crystal radio mounted on her parasol. Radio broadcasting had just begun around 1920, setting off a "radio craze" in the early Roaring 20s. The powered radios of the time, which used vacuum tubes, were large and cumbersome, but the small cheap crystal radio could be carried and shown off as a high-tech marvel. As novelties, experimenters built tiny crystal radios into umbrellas, finger rings, pocketwatches, walking sticks, pipes, and garters. The radio is visible mounted at the center of the parasol behind her head. The antenna wire is strung on the parasol. Because crystal radios run off the power of the radio waves they receive, they cannot drive loudspeakers, so she wears earphones to listen. Caption: "WIRELESS ON THE PARASOL IN PARIS The wires serve as antenna, so the apparatus is altogether portable." |
Date | |
Source | Retrieved August 25, 2010 from Henry Smith Williams (1922) Practical Radio, Funk and Wagnall's Co., New York, p. 21 on Google Books |
Author | Henry Smith Williams |
Licensing
[edit]Public domainPublic domainfalsefalse |
This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
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This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.
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current | 21:44, 17 February 2014 | 710 × 681 (73 KB) | Chetvorno (talk | contribs) | User created page with UploadWizard |
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